docs: def fix_axon_peri_v2(hobj):
      """Replace reconstructed axon with a stub
      :param hobj: hoc object
      """
      for i,sec in enumerate(hobj.axon):
          if i < 2:
              sec.L = 30
              sec.diam = 1
          else:
              sec.L = 1e-6
              sec.diam = 1
  
      h.define_shape()